gluon-core: increase number of available MACs

package/gluon-core/luasrc/usr/lib/lua/gluon/util.lua

@@ -178,13 +178,16 @@ end
 -- 5: mesh1
 -- 6: ibss1
 -- 7: wan_radio1 (private WLAN); mesh VPN
+-- 8: client2
+-- 9: mesh2
+-- A: ibss2
+-- B: wan_radio2
 function M.generate_mac(i)
-	if i > 7 or i < 0 then return nil end -- max allowed id (0b111)
-
 	local hashed = string.sub(hash.md5(sysconfig.primary_mac), 0, 12)
 	local m1, m2, m3, m4, m5, m6 = string.match(hashed, '(%x%x)(%x%x)(%x%x)(%x%x)(%x%x)(%x%x)')
 
 	m1 = tonumber(m1, 16)
+	m5 = tonumber(m5, 16)
 	m6 = tonumber(m6, 16)
 
 	m1 = bit.bor(m1, 0x02)  -- set locally administered bit
@@ -197,6 +200,9 @@ function M.generate_mac(i)
 	m6 = bit.band(m6, 0xF8) -- zero the last three bits (space needed for counting)
 	m6 = m6 + i                   -- add virtual interface id
 
+	local overflow = math.floor(i/8)
+	m5 = math.fmod(m5 + overflow, 256)
+
 	return string.format('%02x:%s:%s:%s:%s:%02x', m1, m2, m3, m4, m5, m6)
 end